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Lumbopelvic Stabilization with Two Methods of Triangular Osteosynthesis: A Biomechanical Study.
Niklas Grüneweller1, Julia Leunig1,2, Ivan Zderic2
1Bielefeld University, Medical School and University Medical Center OWL, Protestant Hospital of the Bethel Foundation, Department of Trauma and Orthopedic Surgery, Burgsteig 13, 33617 Bielefeld, Germany.
Journal of Clinical Medicine
|August 29, 2024
Summary
A novel triangular fixation technique for pelvic fractures showed similar biomechanical stability to the standard method. This new approach, involving a fenestrated iliac screw, offers comparable results in stabilizing unstable pelvic ring fractures.
Area of Science:
- Orthopedic surgery
- Biomechanics
- Trauma management
Background:
- Pelvic fractures, especially dorsal pelvic ring instabilities, are increasing, particularly in orthogeriatric patients.
- Spino-pelvic triangular osteosynthesis effectively stabilizes vertically unstable fractures.
- This study evaluates a novel triangular fixation instrumentation.
Purpose of the Study:
- To compare the biomechanical performance of a novel triangular osteosynthesis technique with the conventional method.
- To assess implant stability and failure modes in artificial osteoporotic pelvic models.
Main Methods:
- Sixteen artificial osteoporotic L5+pelvis models with unstable sacral fractures were used.
- Two fixation groups: conventional triangular fixation (TF) and novel fenestrated iliac screw technique (TFS).
- Cyclic loading to failure was performed for biomechanical testing.
Main Results:
- Both TF and TFS configurations demonstrated comparable initial stiffness and cycles to failure.
- The TFS group showed a trend towards higher cycles to failure and lower loosening.
- These differences were not statistically significant due to the artificial bone model limitations.
Conclusions:
- The novel triangular fixation system using a fenestrated iliac screw provides comparable biomechanical stability to standard triangular osteosynthesis.
- Further research may be needed to confirm the potential advantages of the novel technique in clinical settings.
